A AHPCorrect08
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Transcript of A AHPCorrect08
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HPCap 3 Ton Input Cells Output Cells Do not type in Output CellsNominal Cooling to Actual Correction Factors
Performance @ Nominal Conditions OAT cfm wb db
TCNom 35.8 kBtu/h TC 1.000 0.998 0.934 NA
SCNom 26.4 kBtu/h SC 1.005 1.000 NA #VALUE!
kWNom 2.97 kW kW 1.002 0.999 0.972 NA
SHRNom 0.74
EERNom 12.1 Btu/w-hr Corrected Cooling Conditions and Performance
Cooling Nominal Conditions Actual Conditions (sea level) Performance @ Actual Conditions
EATNom 95 F OATemp 95 F (outdoor) TCcor 33.4 kBtu/h
cfmNom 1200 cfm AirFlow 1200 cfm (indoor) SCcor #VALUE! kBtu/h
DBNom 80 F DryBulb 75 F (indoor) kWcor 2.89 kW
WBNom 67 F WetBulb 63 F (indoor) SHRcor #VALUE!RHNom #VALUE! % RelHumid ### % (indoor) EERcor 11.5 Btu/w-hr
Heating Nominal Conditions
EAThNom 70 F
CFMhNom 1200 cfm
OAThNom 17 F Corrected Heating Conditions and Performance
HCap17 22.6 kBtu/h OATempH 20 F (outdoor) Hcap 22.1 kBtu/h
kW17 2.76 kW AirFlowH 1200 cfm (indoor) kWheat 2.86 kW
COP17 2.40 InAirTempH 70 F (indoor) COP* 2.3
DefrostPen 3.0% % *COP does not include auxiliary
Cooling Performance Correction of Air-Conditioners and Air-to-Air Heat Pumps - See HVAC SimplifiedInput Requirements in Yellow Cells - Output in Blue CellsThis program corrects the nominal condition cooling performance of the air-conditioners and air-to-air pumps to actual conair flow rate). Values used are those presented in Table 5.3 ofHVAC Simplified. The program can be modified to correctchanging the published nominal capacity, demand and air flow rate values in the 'MgfData' worksheet.
If Macro security level is set at high, this program will result inerrors in the cells [NAME?]. To reset the security level (Office 2003and earlier),1. Close the program.2. Click on "Tools" on the main tool bar, select "Macro", select"Security.3. Reset security level to Medium (recommended) or Low4. Exit Excel5. Re-Open Excel6. Run program
For 2007 Office products, theand the procedure has been cthe "trust" settings:
Open ExcelClick the Office Button (top leClick on "Excel Options" buttClick on "Trust Center"Click on "Trust Center SettingClick on " Enable all macros.Open and Run the programsAn option would be to reset thand,Click on " Disable macros wi
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Nominal Heating to Actual Correction Factors
OAT cfm IAT
Hcap 1.01 1.00 1
kWHeat 1.00 1.00 1
heat.
(Kavanaugh, 2006) available from ASHRAE.
dtions (outdoor air temperature, indoor air temperature,the equipment performance of other manufacturers by
erminology "trust" has replaced "security"hanged (as you might expect). To change
t corner of screen)n @ the bottom of the pop-up window
s"."
e trust setting by repeating steps 1 thru 5
th notification"
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Input nominal perfomance @ 95F OAT & 80/67F IAT
2 ton 2.5 ton 3 ton 3.5 ton 4 ton 5 ton
Tot Cap (MBtu/h) 24.7 31.2 35.8 43.6 50 57.6
Sen Cap (MBtu/h) 18.3 24.2 26.4 32 35.7 42
Tot Power (kW) 1.9 2.6 2.97 3.51 4.1 5.08
Air Flow (cfm) 800 1100 1200 1300 1400 1700
Heat Cap @ 17F 12.1 19.2 22.6 28.7 31 35.7
kW In @ 17F 1.5 2.5 2.76 3.08 3.31 4.07
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EAT TC SC kW
85 37.2 27 2.69
95 35.8 26.4 2.97
105 34.5 25.9 3.31
115 33.3 24.5 3.66
EAT TCcf SCcf kWcf
85 1.039 1.023 0.906
95 1.000 1.000 1.000
105 0.964 0.981 1.114
115 0.930 0.928 1.232
EAT= 95 F
TC= 35.8 MBtu/h
SC= 26.6 MBtu/h
kW= 2.98 kW
50 60 70 80 90 100 110 1
0.800
0.900
1.000
1.100
1.200
50 60 70 80 90 100 110
0
5
10
15
20
25
30
35
40
TC
SC
kW
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oat hc kw
57 41.5 3.21
47 36.8 3.1 Err:508
37 26 2.85
27 24.3 2.817 22.6 2.76 1
oat cfHC cfKW
57 1.836 1.163
47 1.628 1.123
37 1.150 1.033
27 1.075 1.014
17 1.000 1.000
20
120
10 15 20 25 30 35 40 45 50 55 60
0.800
1.000
1.200
1.400
1.600
1.800
2.000
AAHP - OAT Correction Factors
cfHC
cfKW
Out Air Temp (F)
CFHC&CFKW
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cfm% TCcf SCcf kWcf
85 0.98 0.93 0.98
95 0.99 0.98 0.99
105 1.01 1.02 1.01115 1.02 1.07 1.03
cfm HC kWheat
0.8 0.98 1.05
1 1 1
1.2 1.02 0.96
75 85 95 105
0.85
0.9
0.95
1
1.05
1.1
% Rated Cfm
CorrectionFactor
0.7 0.8 0.9 1 1.1 1.2 1.3
0.9
0.92
0.94
0.96
0.98
1
1.02
1.04
1.06f(x) = -0.23x + 1.23
f(x) = 0.1x + 0.9
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115 125
TCcf
SCcf
kWcf
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wb TCcf kWcf
61 0.91 0.96
64 0.95 0.98
67 1 171 1.1 1.04
60 65 70 75
70 0.94 0.8
75 1.07 0.95 0.7
80 1.19 1.11 0.82 0.64
85 1.26 0.94 0.8290 1.07 0.98
95 1.2 1.16
iath HC
60 1.02
65 1.01
70 1
75 0.99
iath kWheat
60 0.92
65 0.96
70 1
75 1.04
60 62 64 66
0.8
0.9
1
1.1
1.2
EA Wet Bulb Tem
Corr.Fac
60 65 70 75 80 85
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3f(x) = 0.03x -f(x) = 0.03x - 1.18f(x) = 0.03x - 1.37f(x) = 0.02x - 0.8
60
Linear
Regression for60
65
LinearRegression for
65
db
SCcf
58 60 62 64 66 68 7
0.98
0.98
0.99
0.99
1
1
1.01
1.01
1.02
1.02
1.03
f(x) = 0x + 1.14
58 60 62 64 66 68 7
0.86
0.88
0.9
0.92
0.94
0.96
0.98
1
1.02
1.04
1.06
f(x) = 0.01x + 0.44
kW
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68 70 72
TCcf
kWcf
p(F)
0 95 100
.13
70
Linear
Regression for70
75
LinearRegression for
75
0 72 74 76
HC
LinearRegression forHC
0 72 74 76
eat LinearRegression forkWheat